Position-dependent mechanical characterization of the PBF-EB-manufactured Ti6Al4V alloy

Abstract By means of additive manufacturing, the production components with nearly unlimited geometrical design complexity is feasible. Especially, powder bed fusion techniques such as electron beam (PBF-EB) are currently focused. However, equal material properties mandatory to be able transfer this technique a wide scope industrial applications. Within work, mechanical PBF-EB-manufactured Ti6Al4V alloy investigated function position on building platform. It can stated that as-built surface roughness changes within platform whereby highest detected by computed tomography (Ra = 46.0 ± 5.3 µm) was found for specimens located in front In contrast, no significant differences relative density could determined and assumed fully dense (> 99.9%). Furthermore, all affected an undersized effective diameter compared CAD data. Fatigue tests revealed show slightly lower performance at higher stress amplitudes back process-induced notch-like defects based were preferred location early crack initiation.